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Organisation of cells plant tissues (view source)
Revision as of 16:37, 1 August 2014
, 16:37, 1 August 2014→Notes for teachers
===Notes for teachers===
===Notes for teachers===
Complex permanent tissues are mainly of two types.They are water conducting '''xylem''' and food conducting '''phloem'''.
Complex permanent tissues are mainly of two types.They are water conducting '''xylem''' and food conducting '''phloem'''.
'''XYLEM'''[[Link title]]:<br>
'''XYLEM'''<br>
Xylem is
Xylem is a vascular tissue which transports water and minerals absorbed by the roots,to all parts of the plant, especially to the leaves.Hence it is called '''water conducting tissue'''.<br>
Xylem consists of tracheids,vessels,xylem parenchyma anf xylem fibres.The cells have thick walls and many of them are dead cells.<br>
Tracheids and vessels are tubular structures which help in transport of water and minerals vertically.Vessels consist of sries of elongated cells joined end to end to form tube like structures.<br>
The xylem parenchyma stores food and helps in the sideways conduction of water.Xylem fibres are mainly supportive in function.<br>
http://www.dr-evans.com/advancedbiology/images/xylemstructure.jpg
http://www.bbc.co.uk/bitesize/standard/biology/images/structure_phloem.gif
http://www.infovisual.info/01/img_en/014%20Cross%20section%20of%20a%20stem.jpg
===Activities===
===Activities===
